Apparatus and method for measuring temperature of molten metal
First Claim
1. An apparatus for measuring a temperature of a molten metal, comprising:
- a nozzle which is configured to penetrate through a wall of a vessel accommodating a molten metal, the nozzle having a double pipe structure;
inner and outer pipes;
an image fiber guiding a thermal radiation light of the molten metal facing a distal end of the nozzle, the thermal radiation light of the molten metal is observed while a purge gas is passed through the inner pipe, and while a protective cooling gas for protecting a melting loss of the nozzle is passed through an annular gap space between an outer pipe and an inner pipe of nozzle, wherein a fitting portion is provided between the nozzle and the image fiber, the fitting portion including four connectable portions of the nozzle portion, a purge/cooling gas introduction portion, an image fiber fitting portion with a window glass and an image fiber protection tube;
at least one joint portion disposed on the purge/cooling gas introduction portion so that an optical axis is centered for connecting the thermal radiation light of the molten metal to the image fiber;
an imaging device configured to measure a two-dimensional distribution of a thermal radiation intensity, the imaging device is connected to a rear end of the image fiber, wherein the imaging device is accommodated in a sealed box having a cooling structure, and is disposed in a proximity of an outer wall of a vessel for accommodating the molten metal; and
an arrangement configured to measure the temperature of the molten metal from the thermal radiation light guided by the image fiber.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention provides a cooling system for protecting an image fiber and an imaging device from thermal influences and a temperature measurement apparatus, for a molten metal, capable of being easily controlled and stably measuring the temperature. The temperature measurement apparatus for a molten metal comprises four connectable portions of a nozzle portion a purge/cooling gas introduction portion, an image fiber fitting portion with a window glass and an image fiber to a double pipe nozzle protection tube. A distance from a nozzle distal end as an introduction portion of thermal radiation light to a light reception portion at an image fiber distal end becomes short so that a greater amount of thermal radiation light can be received.
17 Citations
10 Claims
-
1. An apparatus for measuring a temperature of a molten metal, comprising:
-
a nozzle which is configured to penetrate through a wall of a vessel accommodating a molten metal, the nozzle having a double pipe structure;
inner and outer pipes;
an image fiber guiding a thermal radiation light of the molten metal facing a distal end of the nozzle, the thermal radiation light of the molten metal is observed while a purge gas is passed through the inner pipe, and while a protective cooling gas for protecting a melting loss of the nozzle is passed through an annular gap space between an outer pipe and an inner pipe of nozzle, wherein a fitting portion is provided between the nozzle and the image fiber, the fitting portion including four connectable portions of the nozzle portion, a purge/cooling gas introduction portion, an image fiber fitting portion with a window glass and an image fiber protection tube;
at least one joint portion disposed on the purge/cooling gas introduction portion so that an optical axis is centered for connecting the thermal radiation light of the molten metal to the image fiber;
an imaging device configured to measure a two-dimensional distribution of a thermal radiation intensity, the imaging device is connected to a rear end of the image fiber, wherein the imaging device is accommodated in a sealed box having a cooling structure, and is disposed in a proximity of an outer wall of a vessel for accommodating the molten metal; and
an arrangement configured to measure the temperature of the molten metal from the thermal radiation light guided by the image fiber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification